| Type | Title | Author | Publisher | Year |
| Article | On grammars with local and global context conditions | Csuhaj-Varju, E. | | 1993 |
| Article | On grammars with restricted use of productions | Salomaa, A. | | 1969 |
| Article | On ground-confluences of term rewriting systems | Kapur, D., Narendran, P., Otto, F. | | 1990 |
| Article | On hierarchy and closure properties of languages generated by c-grammars | Kelemenova, A., Kelemen, J. | | |
| Article | On infinite words obtained by selective substitution grammars | Siromoney, R., Dare, V.R. | | 1984 |
| Article | On isomorphisms and density of NP and other complete sets | Hartmanis, J.,Berman, L. | | 1975 |
| Article | On kleene algebras and closed semirings | Kozen, D. | | 1990 |
| Article | On languages generated by some types of algorithms | Culik, K. | | 1966 |
| Article | On length sets of informationless L systems | Karhumaki, J. | | 1976 |
| Article | On minimal graphs | Fellner, W.D. | | 1982 |
| Article | On morhpically generated formal power series | Honkala, J. | | |
| Article | On multiple context-free grammars | Seki, H., Matsumura, T., Fujii, M., Kasami, T. | | 1991 |
| Article | On multiple grammars | Kral, J. | | 1969 |
| Article | On non context-free grammar forms | Maurer, H.A., Penttonen, M., Salomaa, A., Wood, D. | | 1979 |
| Article | On non-regular context-free languages and pumping | Culik II, K., Gruska, J., Salomaa, A. | | |
| Article | On non-regular context-free languages and pumping | Culik II, K., Gruska, J., Salomaa, A. | | |
| Article | On one of the boundaries of the constituent conception of grammar | Nebesky, L. | | 1971 |
| Article | On one-state turing machines | Horejs, J. | | 1970 |
| Article | On parsing arithmetic expressions in a multiprocessing environment | Baccelli, F., Fleury, T. | | 1982 |
| Article | On parsing arithmetic expressions in a multiprocessing environment | Baccelli, F., Fleury, T. | | 1982 |
| Article | On predecessors of Finite Languages | Maurer, H.A., Salomaa, A., Wood, D. | | 1981 |
| Article | On predecessors of finite languages | Maurer, H.A., Salomaa, A., Wood, D. | | 1981 |
| Article | On reducing the number of states in a PDA | Goldstine, J., Price, J.K., Wotschke, D. | | 1981 |
| Article | On rela time and linear time cellular automata | Bucher, W., Culik II, K. | | 1984 |
| Article | On representing RE languages by one-sided interna contextual languages | Ehrenfeucht, A., Mateescu, A., Paun, Gh., Rozenberg, G., Salomaa, A. | | |
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